package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    /**
     * 添加购物车
     *
     * @param shoppingCartDTO
     */
    @Override
    public void add(ShoppingCartDTO shoppingCartDTO) {

        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long l = Long.valueOf(4);
        shoppingCart.setUserId(l);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        if (list != null && list.size() == 1) {
            ShoppingCart Cart = list.get(0);
            Cart.setNumber(Cart.getNumber() + 1);
            shoppingCartMapper.update(Cart);
        } else {
            Long dishId = shoppingCart.getDishId();
            if (dishId != null) {
                Dish byId = dishMapper.getById(dishId);
                shoppingCart.setImage(byId.getImage());
                shoppingCart.setName(byId.getName());
                shoppingCart.setAmount(byId.getPrice());
            } else {
                Setmeal setmeal = setmealMapper.getById(shoppingCart.getSetmealId());
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setAmount(setmeal.getPrice());
                shoppingCart.setImage(setmeal.getImage());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    /**
     * 查看购物车
     *
     * @return
     */
    @Override
    public List<ShoppingCart> list() {
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(BaseContext.getCurrentId())
                .build();
        return shoppingCartMapper.list(shoppingCart);
    }

    /**
     * 清空购物车
     */
    @Override
    public void clean() {
        Long l = Long.valueOf(4);
        shoppingCartMapper.cleanAll(l);
    }
    /**
     * 删除购物车中一个商品
     * @param shoppingCartDTO
     */
    @Override
    public void subById(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO, shoppingCart);
        Long l = Long.valueOf(4);
        shoppingCart.setUserId(l);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        ShoppingCart cart = list.get(0);
        if (cart.getNumber() > 1) {
            cart.setNumber(cart.getNumber() - 1);
            shoppingCartMapper.update(cart);
        } else {
            if (cart.getDishId() != null) {
                shoppingCartMapper.deleteById(cart.getDishId(), cart.getSetmealId(), l);

            }
        }
    }
}